Electric condenser



Feb. 24, 1931. E Y 1,794,289

ELECTRIC CONDENSER Filed Sept. 20, 1929 O a D 2: 77 f t/Ge i 25,

Patented Feb. 24, 1931 UNITED STATES PATENT OFFICE EMIL HAEFEIIY, 01 BASEL, SWITZERLAND ELECTRIC CONDENSER Application filed September 20, 1929, Serial No. 394,041, and in Switzerland. October 5, 1928.

This invention relates to electric condensers Figure 2 shows one unit of the apparatus of the type in which the condenser units are on a. larger scale; composed of superposed sheets of conducting Figure 3 illustrates the electrical connecand insulating material spirally wound into a tions of the condenser units in a delta con- 5 cylindrical form. These units are in the case nection. Y of condensers of large capacity usually nm The condenser units a, which are constructmersed in a liquid dielectric such as oil, so ed in. a known manner by winding on a holthat any heat generated during operation is low core metal sheets with interleaved strips dissipated. There is however a possibility of paper soaked in oil, are arranged in a 1 after a time of water in the form of moisture horizontal position and are supported by the 0 entering the liquid dielectric, in which the cover 6, composed of insulated material, of a condenser units are constantly immersed and tank 0" containing the oil bath. The units if this moisture can penetrate into the conare arranged in groups between two vertical denser units, the effect is very serious owing metal supporting rods d, on which they are 15 to the increase in the losses and the inevitable mounted by means of the projecting end ultimate puncture or breakdown of the insleeves e of their hollow cores, the s acing sulation. apart of the several units on the rods being In condensers comprising wound condenser ensured b suitable distance sleeves g. units the latter are asa rule arranged in a The r0 sdnot onl serve for the support of 2 vertical position that is to say, their flat end the condenser units ut also for the electrical surf ces r horizontal and n moi t r connection to the condenser terminal strips slowly entering the oil falls directly on to 0 ugs h,'prov1ded on the ends of the conthe flat surfaces of the units, and is caught denser units. The rods dare connected on the there, gradually penetrating into the interior under side of the cover bto the terminals '5 25 of the units and eventually causing their 1n a delta connectlon by means of wires as breakdown. shown in Figure 3. The removable cover 6 The object of the present invention is to o whlch the eds d a s p nde l o s overcome these disadvantages and for this the Condenser 11 [l1 S t0 be withdrawn as a purpose, according to the invention, the Whole from the liquid dielectric bath.

30 wound d it i t d f b i In the horizontal position of the condenser spaced apart in an upright position in the l a flbove described y m i re p neliquid dielectric, are horizontally arranged ah g Into the 011 bath drips down on the in such a manner that moisture penetrating peripheral surface of the un1ts and sinks to into the dielectric will fall on to the pee bottom of t m h a be p o ded ripheral surfaces of the condenser units and w collectmg and driumng Chamber f r sinktothe bottom. It should be observed that drawmg Off the Water; In my the although the horizontal or vertical position water cannot P i mm t mslde of the of the condenser elements is immaterial as condenser umts Smce even g 40 regards the disadvantageous action above ex- 2 to f gi i i p plained in the case of parafiin-insulated con- 1 6 mm pe e r e r e u 1S 8 mm at this surface and water evidently cannot 3232x 33; g fg gigi gif g gg zgfg Si' enter the vertical front surfaces of the condenser units. In this connection it should be cult or even lmpos.slble" observed that in the improved construction 45 p y g dmyvmg Shows by Way of condenser the metal sheets only are arof p constructional form embody ranged to project on both fiat surfaces of the ing the invent1on: units, the paper insulation which mi ht ab- 7 Figure 1 is a perspective view of the appasorb moisture being set back at eac layer ratus, the condenser itself being raised out of within the ro'ecting edges of the metal 53 a tank containing the oil bath; sheets. As e eating of the units relative stresses to the temperature of the oil hath is only slightly higher (possibly 2-3" (1 the oil which is trapped in the unit remains ste'tion- I cry, and no circulation of oil occurs through the unit itself.

Furthermore at the flat surfaces of the condenser units, the oil is retained by adhesion on the metal sheets so that it is therefore quite impossible for moisture when present in the 50 dielectric to penetrate into the condenser unit and cause its breakdown.

The mounting of the condenser units in the oil bath cover is of course, only referred to hy Way of example, and the connections of 15 the multiple unit condenser could also he efiected in the'oil hath container hy rneans of the supporting and current conducting rods. The number of condenser units employed is also not limited although the con- 29 struction described is particularly adapted for condensers of small capacity.

What I claim is 1. An electric condenser comprising a tank with a liquid dielectric therein and a plug relity of Wound condenser units of the kind described, the latter being arranged s aced apart "from one another Within the liquid dielectric in a horizontal position in sucha manner that'moisture penetrating into the dielectric will fall on to the perlpheral surfaces of the condenser units and sink down to the bottom of the tank, for the purpose specified. 2. An electric condenser comprising a tank with a liquid dielectric therein and a plu- 35 rality of wound condenser unitsof the kind described, the latter being arranged spaced apart from one anothenwithin the liquiddielectric in a horizontal position, and vertical rods for supporting the condenser units, said 40 rods serving also for electric connection of the condenser units and carrying distance sleeves to maintain the condenser units spaced apart on the rods, for the purpose specified.

3. An electric condenser comprising a tank '45 with a liquid dielectric therein and a plurality of wound condenser units of the kind described, the latter being arranged spacedapart from one another "Within the liquid dielectric in a horizontal position, vertical rods for supporting the condenser units, said rods serving also for electric connection of the condenser units and carrying distance sleeves to maintain the condenser units spaced apart on the rods, and a'movable carrying element by which said rods are carried in suspended position and which allows the condenser units to be withdrawn as a whole from the liquid dielectric.

M In witness whereof I have hereunto signed my name this 9th day of September 1929.

EMIL HAEFELY. 

